| 摘要 |
PROBLEM TO BE SOLVED: To reduce the complicated multiplication and addition in an interpolating mechanism or a decimation mechanism and to improve the signal efficiency for interpolation and decimation by finding the symmetry of weight applied to one sample and using it. SOLUTION: An adding mechanism 308A receives a source sample X(N) from a terminal 302, receives a source sample X(N-5) from a delay unit 304E, and generates a signal indicating the sum of the source sample X(N) and the source sample X(N-5). A multiplying mechanism 310A receives the signal indicating the sum of the source samples X(N) and X(N-5) from the adding mechanism 308A, and generates a signal indicating the arithmetic product of the sum and the value of composite weight c00. The composite weight c00 is taken out from a memory or a processor. The signal generated by the adding mechanism 308A is used two times. The number of adding mechanisms necessitated for generating interpolation samples Y0-Y3 is made smaller than the number of adding mechanisms necessitated for generating interpolation signals by using a conventional technique. |
